Anaerobic treatment of chocolate-processing industry wastewater at different organic loading rates and temperatures
| Autor: | A. Jacobo-López, Mario Esparza-Soto, Cheikh Fall, M. Lucero-Chávez |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Suspended solids
Environmental Engineering Materials science Hydraulic retention time Sewage 020209 energy Chemical oxygen demand Temperature 02 engineering and technology 010501 environmental sciences Wastewater Pulp and paper industry 01 natural sciences Waste Disposal Fluid Anaerobic digestion Waste treatment Bioreactors Biogas Volatile suspended solids 0202 electrical engineering electronic engineering information engineering Anaerobiosis Chocolate 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 79(12) |
| ISSN: | 0273-1223 |
| Popis: | The objective of the present study was to determine the optimum operating temperature of laboratory-scale upflow anaerobic sludge blanket (UASB) reactors during the treatment of a chocolate-processing industry wastewater at medium applied organic loading rates (OLRappl). Four UASB reactors were operated at different temperature (15, 20, 25 and 30 °C) and three OLRappl (2, 4 and 6 kg soluble chemical oxygen demand (CODs)/(m3 d)). The flowrate and the hydraulic retention time were constant (11.5 L/d and 6 h, respectively). The monitored parameters were pH, temperature, CODs, and total and volatile suspended solids. The CODs removal efficiency (RE) and biogas production rate (BPR) were calculated. The 15 °C UASB reactor had the lowest RE (39 to 78%) due to the low operating temperature. Regardless of the OLRappl, the RE of the 20, 25 and 30 °C reactors was high and similar to each other (between 88 and 94%). The BPR of the four UASB reactors had the same behaviour as the RE (BPR of 15 °C: 0.3 to 0.5 Lbiogas/(Lreactor d) (Lb/(Lr d)) and BPR of 20, 25 and 30 °C: 0.5 to 1.9 Lb/(Lr d)). |
| Databáze: | OpenAIRE |
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